Top Answer

take 1/2 anad x/17. you would times the #s that are diagnol then divide by the # left.

1 x

_ _

2 17 1x17=17

17/2=8.5

so x=8.5

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When you add or subtract fractions you cross multiply and when you multiply or divide fractions you across multiply.

When doing fractions, you may cross multiply.

yes

No.

cross multiply

You do not need to.

to order fractions you can cross multiply two fractions at a time or you can convert all the fractions into decimals.

To divide fractions, turn the second one over - that is, swap its numerator and denominator - and multiply. Nothing else is necessary. You cross multiply when you have a proportion, that is when you have two ratios that are equal.

Change the fractions to the same denominator then compare.A quick way is to multiply UP on cross multiply and compare.

you have to cross multiply of coarse!

6/7 of 217

if youre dealing with fractions then you multiply top by top and bottom by bottom then simplify

Cross multiplication is when you multiply the denominator of a fraction by the numerator of another fraction. Before you cross multiply you want to see if you can simply the fractions.

yes

1. They are equivalent fractions.2. They cross-multiply to the same value (a/b = c/d if and only if ad = bc).1. They are equivalent fractions.2. They cross-multiply to the same value (a/b = c/d if and only if ad = bc).1. They are equivalent fractions.2. They cross-multiply to the same value (a/b = c/d if and only if ad = bc).1. They are equivalent fractions.2. They cross-multiply to the same value (a/b = c/d if and only if ad = bc).

Multiplying fractions is the easiest operation you can do with them. Nothing complicated is required, just multiply the top two and the bottom two. Simple as that!

easy, just cross multiply

cross multiply and the fraction with the largest total is a greater fraction

write two fractions beside each other,and start at the top right multiply that to the bottom left,and write the answer above it,and multiply the top left to the bottom right,and write the answer above the fraction.

percent over 100 = is over of/ fractions cross multiply 20.5

Cross-multiply. A/B = C/D if AD = BC

multiply and divide fractions!-.-

Multiply straight across and cross reduce when necessary

Two fractions are equivalent if the fully simplified fractions are equal. If you can multiply the fraction with the smaller numerator and denominator by the same value to equal the second fraction. For example the fractions 3/4 and 9/12. The nominator and denominator, 3 and 4 have both been multiplied by 3 to equal 9/12. Cross multiply. If the products are equal, the fractions are equal. Cross multiplying means to multiply each numerator of one fraction with the denominator of the other fraction.

No, you cannot use models to multiply fractions!!